EN 50673:2019

Plug-in type bushings for 72,5 kV with 630 A and 1 250 A for electrical equipment

Extend the scope of the EN50180-1/2/3 and EN50181 for plug-in type bushings up to 72.5 kV

Einsteck-Durchführungen für 72,5 kV mit 630 A und 1 250 A für elektrische Betriebsmittel

Traversées de type embrochable, 72,5 kV, pour transformateurs à diélectrique liquide et autres équipements

Vtični skoznjiki za napetosti 72,5 kV s 630 A in 1250 A za električno opremo

Ta dokument se uporablja za vtične skoznjike, v skladu s standardom EN 60137, za napetost 72,5 kV, z nazivnimi tokovi
od 630 do 1250 A in frekvencami od 15 do 60 Hz za eno- ali trifazne sisteme v električni opremi, kot so transformatorji, polnjeni s tekočino, plinsko izolirane naprave in krmilne naprave. Dokument po potrebi dopolnjuje in spreminja ustrezne standarde EN.
Uporaba takih vtičnih skoznjikov je izpeljana iz standardov EN 50180 in EN 50181, vendar je uporabljena za višje napetosti z opisanimi odkloni od standardov EN 50299-2 in EN 62271-209.
Ta standard ne zajema povezovalnega sestava, kot je opisan v standardih EN 50299-2 in EN 62271-209.
Standard EN 60137 in skupina HD 632 določata kvalifikacijo, tipski preskus, redni in vzorčni preskus vtičnih skoznjikov v skladu s tem standardom.
Ta dokument določa bistvene mere in preskusne postopke za zagotavljanje primerne pritrditve ter zamenljivosti ustreznih medsebojno vtičnih priključkov enakovrednih moči.

General Information

• Status: Published
• Publication Date: 14-Mar-2019
• Withdrawal Date: 26-Dec-2021
• ICS: 29.080.20 - Bushings
• Technical Committee: CLC/TC 36A - Insulated bushings
• Drafting Committee: CLC/TC 36A - Insulated bushings
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 15-Mar-2019
• Due Date: 19-Dec-2019
• Completion Date: 15-Mar-2019
• Ref Project: SIST EN 50673:2019 - Plug-in type bushings for 72,5 kV with 630 A and 1 250 A for electrical equipment

Overview

EN 50673:2019 specifies requirements for plug-in type bushings for 72.5 kV with rated currents of 630 A and 1 250 A used in electrical equipment (for example liquid‑filled transformers and gas‑insulated switchgear). The standard extends the scope of earlier plug‑in bushing documents (EN 50180 / EN 50181 series) to the 72.5 kV voltage class and defines dimensions, tests and interchangeability conditions to ensure reliable mating with separable connectors and extruded‑insulation power cables.

Key topics and technical requirements

• Scope and ratings
  • Maximum system voltage: Um = 72.5 kV
  • Rated currents: 630 A and 1 250 A
  • Frequency range: 15 Hz to 60 Hz
• Interchangeability
  • Establishes interface types (outside‑cone and inside‑cone) and dimensional requirements to ensure mechanical interchangeability between plug‑in bushings and separable connectors.
  • Compliance is initially tied to the specific bushing + separable connector combination used in the type test.
  • Procedures for extending approval to alternative combinations follow HD 629.1 S2 and dielectric re‑qualification per HD 632 series.
• Testing
  • Type, routine and sample tests are performed in accordance with EN 60137 and relevant product standards (EN 60076, EN 62271, HD 632).
  • Minimum dielectric test sequence for extension: partial discharge (ambient), 24 h power‑frequency at 2.5·U0, lightning impulse, 24 h at 2.5·U0, final partial discharge and component examination.
• Electrical and mechanical details
  • Current‑carrying surfaces may be bare copper, silver‑coated copper, tin‑coated copper, or silver‑coated aluminium.
  • High‑voltage shielding electrodes: design must allow venting in any installation position and not obstruct current‑carrying contacts.
  • Ground shielding electrode inside the bushing must provide a grounding connection point.
  • Mounting distances consider separable connector outer dimensions and handling clearances.
• Fixation
  • Outside‑cone bushings for liquid‑filled transformers: flange ring and six clamping paw fixation (material guidance: 3 mm aluminium or non‑magnetic metal sheet).
  • Inside‑cone bushings: no additional fixation means required.

Applications and who uses this standard

• Transformer manufacturers (liquid‑filled), GIS and switchgear designers, cable and separable‑connector manufacturers
• Test laboratories and certification bodies performing type, routine and sample tests
• Specifiers, procurement and asset owners who require interchangeability and standardized interfaces for high‑voltage terminations
• Installers and maintenance teams ensuring correct mounting, grounding and compatibility

Related standards

• EN 60137 (insulated bushings)
• EN 50180 / EN 50181 (earlier bushing interfaces up to 52 kV)
• HD 632 series, EN 62271 series, EN 62271‑209, HD 629.1 S2
• EN 60076 series (power transformers)

Keywords: EN 50673:2019, plug‑in type bushings, 72.5 kV, 630 A, 1250 A, interchangeability, separable connectors, liquid‑filled transformer, GIS, dielectric testing.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2019
Vtični skoznjiki za napetosti 72,5 kV s 630 A in 1250 A za električno opremo
Plug-in type bushings for 72,5 kV with 630 A and 1 250 A for electrical equipment
Einsteck-Durchführungen für 72,5 kV mit 630 A und 1 250 A für elektrische Betriebsmittel
Traversées de type embrochable, 72,5 kV, pour transformateurs à diélectrique liquide et
autres équipements
Ta slovenski standard je istoveten z: EN 50673:2019
ICS:
29.080.20 Skoznjiki Bushings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50673
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2019
ICS 29.080.20
English Version
Plug-in type bushings for 72,5 kV with 630 A and 1 250 A for
electrical equipment
Traversées de type embrochable, 72,5 kV, pour Einsteck-Durchführungen für 72,5 kV mit 630 A und 1 250 A
transformateurs à diélectrique liquide et autres équipements für elektrische Betriebsmittel
This European Standard was approved by CENELEC on 2018-12-27. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50673:2019 E
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Rated values . 6
4.1 Standard values of maximum voltage (U ) . 6
m
4.2 Standard values of rated current (I ) . 6
r
5 Requirements . 6
5.1 Compliance . 6
5.2 Mechanical forces . 6
5.3 High voltage shielding electrode . 6
5.4 Ground shielding electrode . 7
5.5 Transformer drying process . 7
6 Tests . 7
6.1 General . 7
6.2 Interchangeability of plug-in type bushings and separable connectors . 7
7 Dimensions and Applications . 8
7.1 Current- carrying connection interfaces . 8
7.2 Plug-in type bushing mounting distance . 8
7.3 Detail dimensions of plug-in type bushings . 8
7.3.1 General . 8
7.3.2 Outside cone plug-in type bushings . 8
7.3.3 Inside cone plug-in type bushings . 10
8 Requirements for plug-in type bushing fixations to apparatus . 11
8.1 General . 11
8.2 Outside cone plug-in type bushings . 11
8.3 Inside cone plug-in type bushings . 13
Bibliography . 14

European foreword
This document (EN 50673:2019) has been prepared by CLC/TC 36A "Insulated bushings".
The following dates are fixed:
• latest date by which this document has to be (dop) 2019-12-27
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2021-12-27
conflicting with this document have to be
withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Introduction
The object of this document is to specify dimensions, properties, requirements and tests to ensure
interchangeability between plug-in type bushings and separable connectors, installed high voltage power
cables with extruded insulation and connected to electrical equipment, like liquid filled transformers and
gas insulated switchgear and controlgear. The application of such plug-in type bushings is limited to
U = 72,5 kV and rated currents of 630 A and 1 250 A.
m
1 Scope
This document is applicable to plug-in type bushings, according to EN 60137, 72,5 kV, rated currents
from 630 A up to 1 250 A and frequencies from 15 Hz up to 60 Hz for single or three-phase arrangements
in electrical equipment like liquid filled transformers or gas insulated switchgear and controlgear. It
complements and amends, if necessary, the relevant EN standards.
The application of such plug-in type bushings is derived from EN 50180 and EN 50181 but applied for
higher voltages with described deviations to EN 50299-2 and EN 62271-209.
This standard does not cover the connection assembly as described in EN 50299-2 and EN 62271-209.
EN 60137 and HD 632 series outline the qualification, type test, routine and sample test of plug-in type
bushings according to this standard.
This document establishes essential dimensions and testing procedures, to ensure adequate mounting
and interchangeability of mating plug-in separable connectors of equivalent ratings.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 60076 series, Power transformers (IEC 60076 series)
EN 60137, Insulated bushings for alternating voltages above 1 000 V (IEC 60137)
EN 62271 series, High-voltage switchgear and controlgear (IEC 62271 series)
EN 62271-209, High-voltage switchgear and controlgear - Part 209: Cable connections for gas-insulated
metal-enclosed switchgear for rated voltages above 52 kV - Fluid-
...